<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>选择器【群组+派生】</title>
		<style>
			/* 选择器：群组选择器---选中所有 */
			p,div,#table,.dl{
				width: 200px;
				height: 200px;
				background-color: #red;
			}
			/* 派生选择器：后代选择器---选中父元素下的所有子元素，
			语法：元素选择器  元素选择器*/
			ul li{
				width:100px;
				height:100px;
				background: #55ff7f;			
				}
		</style>
	</head>
	<body>
		<ul>
			<li>好东西</li>
			<li></li>
			<li></li>
			<li></li>
		</ul>
		<!-- 块元素：特点：设置宽高，独占一行 -->
		<p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Enim amet assumenda sint. Sint consectetur nostrum expedita repellendus possimus ipsam explicabo impedit, eum doloremque, non aperiam velit quisquam vitae, porro cumque?</p>
		<div>Lorem ipsum dolor sit, amet consectetur adipisicing elit. Ipsum, aperiam non earum nisi odio dolorum quidem reprehenderit corporis ad laboriosam recusandae velit nihil repellendus harum eveniet hic modi excepturi voluptatibus.</div>
		<h2>Lorem ipsum dolor sit amet consectetur adipisicing elit. Repellat distinctio, nobis laborum a, laboriosam maiores accusantium ipsa, molestiae numquam praesentium in obcaecati incidunt eos ea consectetur enim nemo quis atque!</h2>
		<table id="table">
			<tr>
				<td>lorem</td>
				<td>lorem</td>
			</tr>
			<tr>
				<td>lorem</td>
				<td>lorem</td>
			</tr>
		</table>
		<dl>图</dl>
	</body>
</html>